Possibly a single bevel?
Stone Findings
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Corradobrit1
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Yes, most likely. @Markcg would be the best to confirm that possibility. Or Wago Japan Knife Works who seems to have a cozy relationship with Kato San.
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Rockstar stone series is up at Miura
From what I can tell, Shapton rockstars are double thick Shapton glass without the glass backing, right?
maxim
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Yes all single bevels are and all double beveled is sharpened (microbevel) on stones, he uses Uchigomori as finisher
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It is on the market now, the price is pretty good, if it is the same as Shapton glass you are basically getting a double thick version with half the price
Sharpening whetstone SHAPTON Rock star 500 grit
This is Shapton newest product. Quality similar to shapton glass ,but thicker. Size: 210x70x10mm #500 grit 25 micro class Type:WA Serie:Rock star Maker: Sh...
@Tekkz , we'll only know for sure if you buy one! 
I'm curious, so i sent Miura (and also Shapton) an email asking if it was "identical material". Will post reply. If it is, it's interesting they'd double the material in exchange for the glass, and offer that at a lesser price, as the Glass series has such huge market share already. Perhaps the glass+ mounting process is costly, and changing allows for a better profit margin??? All speculation on my part. Will post their response.
I'm curious, so i sent Miura (and also Shapton) an email asking if it was "identical material". Will post reply. If it is, it's interesting they'd double the material in exchange for the glass, and offer that at a lesser price, as the Glass series has such huge market share already. Perhaps the glass+ mounting process is costly, and changing allows for a better profit margin??? All speculation on my part. Will post their response.
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Shapton got back to me. To summarize:
RockStar and GlassStone are the same; RockStar is thicker and does not have backing.
Japanese retail RS product has printed graphics, overseas/US retail models will not. RockStar series available from US retailers est. 1-2 months.
RockStar and GlassStone are the same; RockStar is thicker and does not have backing.
Japanese retail RS product has printed graphics, overseas/US retail models will not. RockStar series available from US retailers est. 1-2 months.
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Knife2meatu
Senior Member
I wouldn't think the glass part of the GS is nearly as expensive doubling the abrasive portion. My guess is this is an attempt by Shapton to entice Japanese buyers to buy into their resinoid stone line, by proposing a more familiar form factor (i.e no glass backing), and an abrasive thickness less radically reduced from what Japanese buyers were accustomed to.@Tekkz , we'll only know for sure if you buy one!
I'm curious, so i sent Miura (and also Shapton) an email asking if it was "identical material". Will post reply. If it is, it's interesting they'd double the material in exchange for the glass, and offer that at a lesser price, as the Glass series has such huge market share already. Perhaps the glass+ mounting process is costly, and changing allows for a better profit margin??? All speculation on my part. Will post their response.
I would expect that that parrying Nanohone market penetration with a line of 10mm thick stones must count in their plans, also.
I think your assumption that this new line must increase Shapton's profit margin compared to the GS line is flawed. I think this is move to increase sales volume & market share, albeit with slimmer profits.
